How to add an Instantiated GameObject to a List in a List

Unity Engine
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1

When I instantiate a GameObject and want to add it to a List in a List and later check the List in the List if there are any GameObjects it says 0.

Instantiation

    public async Task Prepare()
    {
        int currentSeed;
        for (int i = 0; i < manager.pit.Length; i++)
        {
            currentSeed = 0;
            for (int j = 0; j < manager.pit[i]; j++)
            {
                GameObject addme;
                await Task.Delay(10);
                Vector3 point = spawnPoint[i].transform.position;
                point.y = point.y + 0.04f;
                Quaternion rotation = spawnPoint[j].transform.rotation;
                addme = (GameObject)Instantiate(seed, point, rotation);
                seeds[i].Add(addme);
                currentSeed++;
            }
        }
    }

Debug

    public IEnumerator MoveSeed(int pit, Vector3[] targetPos)
    {
        for (int i = 0; i < seeds[pit].Count; i++)
        {
            GameObject send = seeds[pit][i];
            yield return new WaitForSeconds(2);
            Debug.Log($"{seeds[pit].Count}");    //Here it says 0
            SeedMover(send, targetPos[i]);
        }
    }

I thought that maybe it’s because of the public async Task.

2

First, it’s unclear how the coroutine runs in relation to your Prepare() task. It’s best not to mix and match different way of timings, here Task.Delay (which won’t work on WebGL I believe) and WaitForSeconds (which depends on the Update rate).

If the goal is the delay, use a coroutine for instantiating objects and in order to instantiate objects faster than one per frame simply instantiate multiple per coroutine yield.